Bill Nye

"The Science Guy"; Science Communicator, TV Presenter & Mechanical Engineer; Climate Change Activist

David Agus

Co-Founder of Navigenics, Author of "The End of Illness" & Host of "The Checkup with Dr. David Agus"; Professor of Medicine & Engineering at the University of Southern California

The Book of Animal Secrets

LeVar Burton

Literacy Advocate & Actor Known for "Roots," "Star Trek" & "Reading Rainbow"

Ellen DeGeneres

Award-Winning Comedian, TV Host, Actress & LGBTQ Activist

Stephanie Izard

Celebrity Chef, Author, Winner of "Top Chef" Season 4 & Partner of Three Award-Winning Chicago Restaurants

Alex Newell

Grammy Award-Winning Actor & Singer Known for "Glee"

Chrissy Teigen

Model, Author & Television Personality

Rebecca Walker

Bestselling Author & Founder of the Third Wave Feminism Movement

What's Your Story? with author Rebecca Walker

Janice Howroyd

Founder & CEO of The ActOne Group; The First African American Woman to Own a $1 Billion Brand

Gina Rodriguez

Award-Winning Actress, Producer, Director, Model & Humanitarian

Sophia Bush

Actress, Humanitarian & Author

Chelsea Handler

Comedian, TV Personality & Author

Patricia Arquette

Academy Award-Winning Actress, Activist, Humanitarian & Author

Cat Cora

World-Renowned Chef, Author, Restaurateur, Contributing Editor, Television Host, Actress, Avid Philanthropist, Health and Fitness Expert & Lifestyle Entrepreneur

Jim Abbott

Former One-Handed Major League Baseball Pitcher

Deepak Chopra

Co-Founder of The Chopra Center for Wellbeing

Daniel Burrus

Technology Futurist, Business Strategist & Hall of Fame Speaker

Keke Palmer

Actress & Youngest Talk Show Host in TV History

Priyanka Chopra Jonas

Award-Winning Actress, Producer & Humanitarian

Priyanka Chopra Jonas Takes a Lie Detector Test | Vanity Fair

Greg Louganis

4x Olympic Gold Medal Diver; LGBTQ Activist & Author